Pipe-wrench.



Patented Oct. 25, 1910.

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L. R. BLAGKMORE. PIPE WRENCH. LPPLIOATION IILED JUNE 5,1909. 974,01 9.

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2 SHEETS-SHEET 2 ATTORNE Y8 Patented Oct. 25,1910.

LAWRENCE R. BLACKMORE, OF MQKEESPORT, PENNSYLVANIA.

PIPE-WRENCH.

Specification of Letters Patent.

Patented Oct. 25, 1910.

Application filed June 5, 1909. Serial No. 500,328.

To all whom it may concern:

Be it known that I, LAWRENCE R. BLACK- MORE, a citizen of the United States, and a resident of McKeesport, in the county of Allegheny and State of Pennsylvania, have made certain new and useful Improvements in Pipe-Wrenches, of which the following is a specification.

This invention is an improvement in pipe wrenches and consists in certain novel constructions and combinations of parts as will be hereinafter described and claimed.

In the drawings Figure 1 is a side view of a wrench embodying my invention. Fig. 2 is a detail longitudinal section on about line 22 of Fig. 1. Fig. 3 is a side view of the wrench, one of the jaws being removed and the fastening bolt being shown in section. Fig. 4 is a detail section illustrating the surfaces for engagement by the chain links. Fig. 5 is a detail perspective view of the head end of the handle bar. Fig. 6 is a detail enlarged perspective view of a portion of one of the jaws shown in Fig. 3, and illustrating the seats for engagement by the chain links. Figs. 7 and 8 are sectional views partly broken away, illustrating the connecting link engaging with the jaws together with different forms of chain links. Fig. 9 is an elevation of the inner face of a different form of jaw from that shown in Figs. 1, 2 and 3. Fig. 10 is a longitudinal section, partly broken away, illustrating the jaw shown in Fig. 9, applied to the wrench head illustrated in Figs. 1, 2, 3 and 5, and Fig. 11 illustrates a modified form of the jaw shown in Fig. 9.

The handle A is formed at one end with a head A preferably tapering toward its extremity as shown in Figs. 3 and 5, and provided near its said extremity with a transverse bolt hole A in line with and beyond laterally extending studs A 011 opposite sides of the head A, and extending in a direction parallel to the axis of the opening A This tapering form facilitates a tightfitting of the jaw sections 13 to the wrench head and the said jaw sections are recessed in their opposite faces at B to fit the head A and are provided with openings 13, and B registering respectively, with the opening A and the studs A when the parts are applied as shown in Fig. 2, so that the studs A project into the openings B and the bolt 0 may be passed through the openings A and B and secured to hold the jaw sections firmly upon the head A, the studs A increasing the strength of the connection as will be understood from Figs. 1, 2 and 3 of the drawings.

The jaw sections shownin Figs. 1, 3 and 6 are provided with the central curved seat D and with the serrated faces D sloping down therefrom, and in the inner faces of the jaws at their lower edges I provide the transversely curved seats H adapted to receive the links I of the chain shown in Figs. 3, 4 and 10, and these curved seats H are provided with notches J, see Figs.3,4,6,7 and 8, which notches J are adapted to receive the studs K on the connecting link K shown in Fig. 7, or the lateral studs L on the sprocket form of chain shown in Fig. 7, as will be understood from the drawings. It will be noticed that the connecting link K has the lateral studs K, and is also provided with a rounded body K and with a shank K connecting it with the sprocket form of link as shown in Fig. 7, or with the open link as shown in Fig. 8 of the drawings.

In Fig. 9 I show a somewhat different form of jaw from that shown in Figs. 1, 3 and 6, the jaw M shown in Figs. 9 and 10 having the toothed faces M at an acute angle and being provided with openings for the studs A and the bolt C, and also provided in their inner faces in alinement with the said openings with sockets at M for the studs of the connecting link N. The jaw sections M being also provided at M with studs for engagement by the chain links in the operation of the invention.

In Fig. 11 I show a jaw somewhat similar to that shown in Figs. 9 and 10 except that in Fig. 11, I employ only one toothed face, this jaw shown in Fig. 11, being single instead of duplex as shown in Fig. 9. l

I claim The improvement in wrenches herein described comprising a handle having a head tapering toward its extremity and provided with a transverse bolt hole, and at its opposite sides with projecting studs extending in a direction parallel to the axis of the bolt hole, jaw sections recessed in their inner faces to fit said tapered head, and provided with openings to receive the lateral studs 1 in said seats notches adapted to receive latthereof, and With bolt holes registering, eral studs, and a chain coiipei'ating with the When the parts are applied, with the bolt said jaws, substantially as set forth.

hole of the head, the said jaw sections hav- LAWRENCE R. BLACKMORE. ing jaw faces and provided in their inner Witnesses:

edges Withcurved seats adapted to receive GEORGE G. BLAGKMORE, the rounded ends of open links, and having WM. M. NOBLE. 

